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Shi, W. (author), Theelen, Mirjam (author), Illiberi, Andrea (author), van der Sar, S.J. (author), Butterling, M. (author), Schut, H. (author), Zeman, M. (author), Brück, E.H. (author), Eijt, S.W.H. (author)Positron annihilation lifetime spectroscopy (PALS) and Doppler broadening positron annihilation spectroscopy DB-PAS) depth profiling demonstrate pronounced growth of vacancy clusters at the grain boundaries of as-deposited Al-doped ZnO films deposited as transparent conductive oxide (TCO) on Cu(In, Ga)Se2 (CIGS) solar cells upon accelerated...journal article 2018
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Zhang, S. (author), Kwakernaak, C. (author), Tichelaar, F.D. (author), Sloof, W.G. (author), Kuzmina, M. (author), Herbig, M. (author), Raabe, D. (author), Brück, E. (author), Van der Zwaag, S. (author), Van Dijk, N.H. (author)The autonomous repair mechanism of creep cavitation during high-temperature deformation has been investigated in Fe-Au and Fe-Au-B-N alloys. Combined electron-microscopy techniques and atom probe tomography reveal how the improved creep properties result from Au precipitation within the creep cavities, preferentially formed on grain boundaries...journal article 2015
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Miao, X.F. (author), Caron, L. (author), Gercsi, Z. (author), Daoud-Aladine, A. (author), Van Dijk, N.H. (author), Brück, E. (author)The thermal-history dependence of the magnetoelastic transition in (Mn,Fe)2(P,Si) compounds has been investigated using high-resolution neutron diffraction. As-prepared samples display a large difference in paramagnetic-ferromagnetic (PM-FM) transition temperature compared to cycled samples. The initial metastable state transforms into a lower...journal article 2015
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Yibole, H. (author), Guillou, F. (author), Caron, L. (author), Jimenez, E. (author), De Groot, F.M.F. (author), Roy, P. (author), De Groot, R. (author), Van Dijk, N.H. (author), Brück, E. (author)A strong electronic reconstruction resulting in a quenching of the Fe magnetic moments has recently been predicted to be at the origin of the giant magnetocaloric effect displayed by Fe2P-based materials. To verify this scenario, x-ray magnetic circular dichroism experiments have been carried out at the L edges of Mn and Fe for two typical...journal article 2015
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Miao, X.F. (author), Caron, L. (author), Roy, P. (author), Dung, N.H. (author), Zhang, L. (author), Kockelmann, W.A. (author), De Groot, R.A. (author), Van Dijk, N.H. (author), Brück, E. (author)Neutron-diffraction experiments on the (Mn,Fe)2(P,Si)-type compounds have shown a site preference of Si atoms in the hexagonal structure. The degree of ordering of Si depends on the Si/P ratio, while it is independent of the Mn/Fe ratio. The ferromagnetic-paramagnetic magnetoelastic transition is closely related to the size of the magnetic...journal article 2014
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Guillou, F. (author), Porcari, G. (author), Yibole, H. (author), Van Dijk, N.H. (author), Brück, E. (author)Large magnetically driven temperature changes are observed in MnFe(P,Si,B) materials simultaneously with large entropy changes, limited (thermal or magnetic) hysteresis, and good mechanical stability. The partial substitution of B for P in MnFe(P,Si) compounds is found to be an ideal parameter to control the latent heat observed at the Curie...journal article 2014
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Guillou, F. (author), Brück, E. (author)The inverse magnetocaloric effect taking place at the antiferro-to-ferromagnetic transition of (Co,Fe)MnP phosphides has been characterised by magnetic and direct ?Tad measurements. In Co0.53Fe0.47MnP, entropy change of 1.5?Jkg?1?K?1 and adiabatic temperature change of 0.6?K are found at room temperature for an intermediate field change (?B?=?1...journal article 2013
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Caron, L. (author), Hudl, M. (author), Höglin, V. (author), Dung, N.H. (author), Gomez, C.P. (author), Sahlberg, M. (author), Brück, E. (author), Andersson, Y. (author), Nordblad, P. (author)Magnetic and magnetocaloric properties of high-purity, giant magnetocaloric polycrystalline and single-crystalline Fe2P are investigated. Fe2P displays a moderate magnetic entropy change, which spans over 70 K and the presence of strong magnetization anisotropy proves this system is not fully itinerant but displays a mix of itinerant and...journal article 2013
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Caron, L. (author), Miao, X.F. (author), Klaasse, J.C.P. (author), Gama, S. (author), Brück, E. (author)Structural, magnetic, and magnetocaloric properties of Mn2-xCrxSb compounds have been studied. In these compounds, a first order magnetic phase transition from the ferrimagnetic to the antiferromagnetic state occurs with decreasing temperature, giving rise to giant inverse magnetocaloric effects that can be tuned over a wide temperature interval...journal article 2013
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Porcari, G. (author), Buzzi, M. (author), Cugini, F. (author), Pellicelli, R. (author), Pernechele, C. (author), Caron, L. (author), Brück, E. (author), Solzi, M. (author)n experimental setup for the direct measurement of the magnetocaloric effect capable of simulating high frequency magnetothermal cycles on laboratory-scale samples is described. The study of the magnetocaloric properties of working materials under operative conditions is fundamental for the development of innovative devices. Frequency and time...journal article 2013
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Zhang, S. (author), Langelaan, G. (author), Schut, H. (author), Brück, E. (author), Van der Zwaag, S. (author), Van Dijk, N.H. (author)Steels are among the most widely used construction materials as their mechanical properties can be tuned over a very wide range of desired combinations of strength formability and other properties. However, when exposed for long times to high temperatures steel components can exhibit premature and low-ductility creep fracture, which arises from...conference paper 2013
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Zhang, S. (author), Schut, H. (author), Brück, E. (author), Van der Zwaag, S. (author), Van Dijk, N.H. (author)The role of deformation-induced defects and carbon addition on the copper precipitation during aging at 550 oC is investigated in high-purity Fe-Cu-B-N-C alloy samples by Coincidence Doppler Broadening. In samples with 0% and 8% cold pre-strain, the influence of tensile pre-deformation on the precipitation kinetics of copper is studied. The...journal article 2013
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Wang, J.L. (author), Caron, L. (author), Campbell, S.J. (author), Kennedy, S.J. (author), Hofmann, M. (author), Cheng, Z.X. (author), Md Din, M.F. (author), Studer, A.J. (author), Brück, E. (author), Dou, S.X. (author)We report the dramatic effect of applied pressure and magnetic field on the layered intermetallic compound Pr0.5Y0.5Mn2Ge2. In the absence of pressure or magnetic field this compound displays interplanar ferromagnetism at room temperature and undergoes an isostructural first order magnetic transition (FOMT) to an antiferromagnetic state below...journal article 2013
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Dung, N.H. (author), Zhang, L. (author), Ou, Z.Q. (author), Zhao, L. (author), Van Eijck, L. (author), Mulders, A.M. (author), Avdeev, M. (author), Suard, E. (author), Van Dijk, N.H. (author), Brück, E. (author)Using high-resolution neutron diffraction measurements for Mn-rich hexagonal Mn-Fe-P-Si compounds, we show that the substitution of Mn for Fe on the 3f sites results in a linear decrease of the Fe/Mn(3f) magnetic moments, while the Mn(3g) magnetic moments remain constant. With increasing temperature, the Mn(3g) magnetic moments show almost no...journal article 2012
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Brück, E. (author), Trung, N.T. (author), Ou, Z.Q. (author), Buschow, K.H.J. (author)The effect of Co and Ni substitutions for Fe on the magnetocaloric properties of MnFe(P,Ge) compounds crystallizing in the hexagonal Fe2P type of structure was studied. It was found that, by changing composition, a small thermal hysteresis and a giant magnetocaloric effect can be obtained simultaneously in MnFe(P,Ge) compounds when the magnetic...journal article 2012
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Dung, N.H. (author), Zhang, L. (author), Ou, Z.Q. (author), Brück, E. (author)We report on structural, magnetic, and magnetocaloric properties of MnxFe1.95?xP0.50Si0.50 (x???1.10) compounds. With increasing the Mn:Fe ratio, a first-order magneto-elastic transition gradually changes into a first-order magneto-structural transition via a second-order magnetic transition. The study also shows that thermal hysteresis can be...journal article 2011
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Caron, L. (author), Trung, N.T. (author), Brück, E. (author)Effects of physical and chemical pressures in the Mn1?xCrxCoGe series of compounds are studied. Cr substitution and hydrostatic pressure play similar roles in displacing TC to lower temperatures and coupling or decoupling magnetic and crystallographic transitions. In this work the similarities and differences between the effects of chemical and...journal article 2011
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Brück, E.H. (author), Trung, N.T. (author), Zhang, L. (author), Caron, L. (author), Buschow, K.H.J. (author)The MnCoGe alloy can crystallize in either the hexagonal Ni2In- or the orthorhombic TiNiSi-type of structure. In both phases MnCoGe behaves like a typical ferromagnet with a second-order magnetic phase transition. For MnCoGeBx with B on interstitial positions, we discover a giant magnetocaloric effect associated with a single first-order...journal article 2010
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Trung, N.T. (author), Biharie, V. (author), Zhang, L. (author), Caron, L. (author), Buschow, K.H.J. (author), Brück, E.H. (author)Substitution of some Cr for Mn atoms in MnCoGe was employed to control the magnetic and structural transitions in this alloy to coincide, leading to a single first-order magnetostructural transition from the ferromagnetic to the paramagnetic state with a giant magnetocaloric effect observed near room temperature. Further increase in the Cr...journal article 2010
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Sakarya, S. (author), Gubbens, P.C.M. (author), Yaouanc, A. (author), Dalmas de Réotier, P. (author), Andreica, D. (author), Amato, A. (author), Zimmermann, U. (author), Van Dijk, N.H. (author), Brück, E. (author), Huang, Y. (author), Gortenmulder, T. (author)Results of a detailed investigation of the ferromagnetic superconductor UGe2 using positive muon spin rotation and relaxation techniques are presented. The pressure and temperature dependences of the frequencies and related spin-spin relaxation rates show that the transition from the weakly to the strongly polarized magnetic (WP-SP) phases is...journal article 2010
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